From 9ac6f6d3bfe2566c2e5960f5f9b6167d8e0a4ae9 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Tue, 16 Apr 2013 07:18:25 -0700
Subject: [PATCH] Start implementing IRQ

---
 src/gba/gba-video.c |  8 +++++---
 src/gba/gba.c       |  4 ++++
 src/gba/gba.h       | 19 +++++++++++++++++++
 3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/src/gba/gba-video.c b/src/gba/gba-video.c
index c94e81d16..1b49bf4d2 100644
--- a/src/gba/gba-video.c
+++ b/src/gba/gba-video.c
@@ -1,5 +1,7 @@
 #include "gba-video.h"
 
+#include "gba.h"
+
 #include <limits.h>
 
 static void GBAVideoDummyRendererInit(struct GBAVideoRenderer* renderer);
@@ -61,7 +63,7 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
 				video->nextVblankIRQ = video->nextEvent + VIDEO_TOTAL_LENGTH;
 				//video->cpu.mmu.runVblankDmas();
 				if (video->vblankIRQ) {
-					//video->cpu.irq.raiseIRQ(video->cpu.irq.IRQ_VBLANK);
+					GBARaiseIRQ(video->p, IRQ_VBLANK);
 				}
 				//video->vblankCallback();
 				break;
@@ -76,7 +78,7 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
 
 			video->vcounter = video->vcount == video->vcountSetting;
 			if (video->vcounter && video->vcounterIRQ) {
-				//video->cpu.irq.raiseIRQ(video->cpu.irq.IRQ_VCOUNTER);
+				GBARaiseIRQ(video->p, IRQ_VCOUNTER);
 				video->nextVcounterIRQ += VIDEO_TOTAL_LENGTH;
 			}
 
@@ -95,7 +97,7 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
 				//video->cpu.mmu.runHblankDmas();
 			}
 			if (video->hblankIRQ) {
-				//video->cpu.irq.raiseIRQ(video->cpu.irq.IRQ_HBLANK);
+				GBARaiseIRQ(video->p, IRQ_HBLANK);
 			}
 		}
 
diff --git a/src/gba/gba.c b/src/gba/gba.c
index 1294ca33a..c63692112 100644
--- a/src/gba/gba.c
+++ b/src/gba/gba.c
@@ -86,6 +86,10 @@ void GBALoadROM(struct GBA* gba, int fd) {
 	// TODO: error check
 }
 
+void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq) {
+	GBALog(GBA_LOG_STUB, "Attempting to raise IRQ");
+}
+
 void GBALog(int level, const char* format, ...) {
 	va_list args;
 	va_start(args, format);
diff --git a/src/gba/gba.h b/src/gba/gba.h
index 896d909cd..7f5dbeede 100644
--- a/src/gba/gba.h
+++ b/src/gba/gba.h
@@ -6,6 +6,23 @@
 #include "gba-memory.h"
 #include "gba-video.h"
 
+enum GBAIRQ {
+	IRQ_VBLANK = 0x0,
+	IRQ_HBLANK = 0x1,
+	IRQ_VCOUNTER = 0x2,
+	IRQ_TIMER0 = 0x3,
+	IRQ_TIMER1 = 0x4,
+	IRQ_TIMER2 = 0x5,
+	IRQ_TIMER3 = 0x6,
+	IRQ_SIO = 0x7,
+	IRQ_DMA0 = 0x8,
+	IRQ_DMA1 = 0x9,
+	IRQ_DMA2 = 0xA,
+	IRQ_DMA3 = 0xB,
+	IRQ_KEYPAD = 0xC,
+	IRQ_GAMEPAK = 0xD
+};
+
 enum GBAError {
 	GBA_NO_ERROR = 0,
 	GBA_OUT_OF_MEMORY = -1
@@ -41,6 +58,8 @@ void GBAMemoryDeinit(struct GBAMemory* memory);
 void GBABoardInit(struct GBABoard* board);
 void GBABoardReset(struct ARMBoard* board);
 
+void GBARaiseIRQ(struct GBA* gba, enum GBAIRQ irq);
+
 void GBAAttachDebugger(struct GBA* gba, struct ARMDebugger* debugger);
 
 void GBALoadROM(struct GBA* gba, int fd);